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protonema
[ proh-tuh-nee-muh ]
noun
- a primary, usually filamentous structure produced by the germination of the spore in mosses and certain related plants, and from which the leafy plant which bears the sexual organs arises as a lateral or terminal shoot.
protonema
/ ˌprəʊtəˈniːətəl; -ˈnɛətəl; ˌprəʊtəˈniːə /
noun
- a branched threadlike structure that grows from a moss spore and eventually develops into the moss plant
protonema
/ ō′tə-ŧ′ə /
, Plural protonemata ō′tə-ŧ′ə-tə,-nĕm′ə-
- The green filamentous or flat, thallus-like structure that grows from the germinated spores of liverworts and mosses and eventually gives rise to a mature gametophyte.
Derived Forms
- ˌdzٴˈԱ, adjective
Other yvlog Forms
- t·Աm adjective
yvlog History and Origins
Origin of protonema1
yvlog History and Origins
Origin of protonema1
Example Sentences
When it lands, the spore sprouts a collection of alga-like filaments called a protonema.
After a few weeks, leaflets begin to sprout from the protonema and grow into the moss plant we know and love.
When the scientists cultured these stunted but sprouty sporophytes to see what would happen, the filaments grew into a mass resembling a protonema after a week.
A week after that, the protonema produced a leafy bud resembling that made by normal moss gametophytes.
C, a normal "wild type" haploid moss gametophyte sprouting from its filamentous protonema.
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